<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->

      <el-table border :data="roleList">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1===0?'bdtop':'',,'vcenter']" v-for="(item1,i1) in scope.row.children"
              :key="item1.id">
              <!--  渲染一级权限 -->
              <el-col :span="5">
                <el-tag @close="removeRightById(scope.row,item1.id)" closable>{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <!-- 通过for循环嵌套渲染三级权限 -->
                    <el-row :class="[i3 === 0? '' : 'bdtop']" v-for="(item3,i3) in item2.children" :key="item3.id">
                      <el-col :span="13">
                        <el-tag type="warning" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}
                        </el-tag>
                      </el-col>
                    </el-row>
                  </el-col>

                </el-row>
              </el-col>

            </el-row>



          </template>
        </el-table-column>

        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>

        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" @click="showSetRightDialog">分配权限</el-button>
          </template>
        </el-table-column>


      </el-table>

    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%">
      
      <el-tree :data="rightList" :props="treeProps" show-checkbox default-expand-all node-key="id" :default-checked-keys="defKeys"></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="setRightDialogVisible = false">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
  export default {
    created() {
      this.getRolelist()
    },
    data() {
      return {
        // 所有角色列表数据
        roleList: [],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 权限列表
        rightList:[],
        // 树形控件的属性绑定对象
        treeProps:{
          label:'authName',
          children:'children'
        },
        // 默认选中的节点id值数组
        defKeys:[]
      }
    },
    methods: {
      // 获取所有角色的列表
      async getRolelist() {
        const { data: res } = await this.$http.get('roles');
        if (res.meta.status != 200) {
          return this.$message.error('获取角色列表数据失败')
        }
        this.roleList = res.data
      },
      // 根据id删除对应的权限
      async removeRightById(role, rightId) {
        // 弹窗提示用户是否要删除
        const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.error('用户取消了删除');
        }
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败')
        }
        // this.getRolelist(); 
        role.children = res.data

      },
       // 展示分配权限的对话框
       async showSetRightDialog() {
        // 获取所有权限的数据
          const {data :res} = await this.$http.get('rights/tree')

          if(res.meta.status !== 200){
            return this.$message.error('获取权限数据失败')
          }
           this.rightList=res.data
        this.setRightDialogVisible = true
      },
      // 通过递归的形式,获取所有角色下三级权限的id,并保存到defKeys数组中
      getLeafKeys(){
        
      }
    },
   

  }

</script>
<style lang='less' scoped>
  .el-tag {
    margin: 10px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>